if you wish to use conditional copy you can use a RegexTransformer
<field column="guid" xpath="/rss/channel/guid"/>
<field column="id" regex=".*" sourceColName="guid"
replaceWith="${entityname.guid}"/>
this means that if guid!= null 'id' will be set to guid
On Mon, Sep 14, 2009 at 4:16 PM, Grant Ingersoll <gsing...@apache.org> wrote:
> As I said, copying is not an option. That will break everything else.
>
> On Sep 14, 2009, at 1:07 AM, Noble Paul നോബിള് नोब्ळ् wrote:
>
>> The XPathRecordreader has a limit one mapping per xpath. So copying is
>> the best solution
>>
>> On Mon, Sep 14, 2009 at 2:54 AM, Fergus McMenemie <fer...@twig.me.uk>
>> wrote:
>>>>
>>>> I'm trying to import several RSS feeds using DIH and running into a
>>>> bit of a problem. Some feeds define a GUID value that I map to my
>>>> Solr ID, while others don't. I also have a link field which I fill in
>>>> with the RSS link field. For the feeds that don't have the GUID value
>>>> set, I want to use the link field as the id. However, if I define the
>>>> same XPath twice, but map it to two diff. columns I don't get the id
>>>> value set.
>>>>
>>>> For instance, I want to do:
>>>> schema.xml
>>>> <field name="id" type="string" indexed="true" stored="true"
>>>> required="true"/>
>>>> <field name="link" type="string" indexed="true" stored="false"/>
>>>>
>>>> DIH config:
>>>> <field column="id" xpath="/rss/channel/item/link" />
>>>> <field column="link" xpath="/rss/channel/item/link" />
>>>>
>>>> Because I am consolidating multiple fields, I'm not able to do
>>>> copyFields, unless of course, I wanted to implement conditional copy
>>>> fields (only copy if the field is not defined) which I would rather not.
>>>>
>>>> How do I solve this?
>>>>
>>>
>>> How about.
>>>
>>> <entity name="x" ... transformer="TemplateTransformer">
>>> <field column="link" xpath="/rss/channel/item/link" />
>>> <field column="GUID" xpath="/rss/channel/GUID" />
>>> <field column="id" template="${x.link}" />
>>> <field column-"id" template="${x.GUID}" />
>>>
>>> The TemplateTransformer does nothing if its source expression is null.
>>> So the first transform assign the fallback value to ID, this is
>>> overwritten by the GUID if it is defined.
>>>
>>> You can not sort of do if-then-else using a combination of template
>>> and regex transformers. Adding a bit of maths to the transformers and
>>> I think we will have a turing complete language:-)
>>>
>>> fergus.
>>>
>>>> Thanks,
>>>> Grant
>>>
>>> --
>>>
>>> ===============================================================
>>> Fergus McMenemie Email:fer...@twig.me.uk
>>> Techmore Ltd Phone:(UK) 07721 376021
>>>
>>> Unix/Mac/Intranets Analyst Programmer
>>> ===============================================================
>>>
>>
>>
>>
>> --
>> -----------------------------------------------------
>> Noble Paul | Principal Engineer| AOL | http://aol.com
>
> --------------------------
> Grant Ingersoll
> http://www.lucidimagination.com/
>
> Search the Lucene ecosystem (Lucene/Solr/Nutch/Mahout/Tika/Droids) using
> Solr/Lucene:
> http://www.lucidimagination.com/search
>
>
--
-----------------------------------------------------
Noble Paul | Principal Engineer| AOL | http://aol.com
